ZM7316G-65503-B1

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Applications:	Digital Power Controller
Voltage - Input:	--
Voltage - Supply:	3 V ~ 3.6 V
Current - Supply:	12mA
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	64-QFN
Supplier Device Package:	64-QFN-EP (9x9)

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ZM7316G-65503-B1 Application Field and Working Principle

Introduction

The ZM7316G-65503-B1 is a power management integrated circuit. This device is highly integrated and includes a flexibility of features and functions to provide cost effective solutions for embedded systems requiring multiple power rails and low standby power.

Application Field

The ZM7316G-65503-B1 can be applied for power management in embedded applications, especially for ground-breaking applications with small spaces. It is suitable for energizing or powering high-performance and high-current embedded systems requiring multiple power rails, such as PDAs and laptops, industrial controllers, and medical systems etc.

Power-up sequence

The power-up sequence can be pre-defined by setting a specific order for powering the different devices in a system before the main power rail is enabled. The devices powered by the ZM7316G-65503-B1 can be grouped in up to 8 independent power rails, based on the rail selection logic. There are 4 output pins available to select the active power rail.

Features

The ZM7316G-65503-B1 includes various features suitable for power management in embedded applications:

• High Accuracy: ±3mV Input/Output Voltage Accuracy at -40 °C to 85 °C.
• Low Standby Power: 0.1μA Operating Current in Sleep Mode.
• Wide Output Voltage Range: 0. 6V to 5.0V Output Voltage.
• High Efficiency: up to 95% Efficiency for 5V Output.
• Up to 8 Power Rails: provided via pins for rail selection.
• High Frequency Synchronous Buck Mode: 500kHz/1MHz/2MHz operation.
• Programmable External Current Limit: up to 5A.
• Programmable Soft-Start: 4μs to 200μs.

Working Principle

When the power is applied to the ZM7316G-65503-B1, its internal circuitry begins powering the system devices in a specific order. The internal buck converter operates in a synchronous buck mode, which maximizes efficiency and reduces the danger of thermal effects due to extended operating temperature ranges. The output voltage of the ZM7316G-65503-B1 is generated from a fixed or adjustable reference voltage. The reference voltage is passed through a voltage divider network to generate an output voltage. This output voltage is then regulated using the voltage and current feedback loop of the buck converter.The device also features a buck converter with programmable power-up sequence, allowing for custom power-up sequences suitable for the application. Finally, the device provides protection circuitry to efficiently protect the system from overvoltage and undervoltage conditions.

Conclusion

In conclusion, the ZM7316G-65503-B1 is an integrated and versatile power management IC suitable for powering a variety of embedded systems, from PDAs and laptops to industrial and medical systems. Its features allow for custom power-up sequencing and efficient power conversion, enabling reliable and cost effective solutions for embedded systems.

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